Method and apparatus for reprogramming a programmed controller of a power driven wheelchair

• US 7,171,288 B2
• Filed: 10/06/2003
• Issued: 01/30/2007
• Est. Priority Date: 10/06/2003
• Status: Active Grant

• Current Assignee: Invacare Corporation
• Original Assignee: Invacare Corporation
• Inventors: Wakefield, Theodore D. II
• Primary Examiner(s): Nguyen; Thu V.
• Application Number:
  US10/679,994
• Publication Number:
  US 20050075758A1
• Time in Patent Office: 1,212 Days
• Field of Search: 701/1
• US Class Current: 701/1
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G06F 17/00 Digital computing or data processing equipment or methods, specially adapted for specific functions information retrieval, database structures or file system structures therefor G06F16/00

Abstract

Apparatus for reprogramming a programmed controller of a power driven wheelchair comprises: a reprogrammable, non-volatile memory programmed with a plurality of programs executable by the controller to operate the wheelchair, the non-volatile memory disposed at the wheelchair and coupled to the wheelchair controller; a general-purpose computer programmed to reprogram the non-volatile memory while disposed at the wheelchair, the programmed computer for storing main programs for use in reprogramming the non-volatile memory, the programmed computer being coupleable to the wheelchair controller for accommodating an exchange of data therebetween; and wherein the wheelchair controller being operative to communicate with the programmed computer to reprogram the non-volatile memory with the main programs while the non-volatile memory is disposed at the wheelchair. Methods for reprogramming the non-volatile memory are also disclosed.

Claims

1. Apparatus for reprogramming a programmed controller of a power driven wheelchair, said apparatus comprising:

a reprogrammable, non-volatile memory programmed with a plurality of programs, including drive and application programs executable by said controller to operate said wheelchair, said non-volatile memory disposed at said wheelchair and coupled to said wheelchair controller;

a general-purpose computer programmed to reprogram said non-volatile memory while disposed at said wheelchair, said programmed computer for storing replacement programs use in reprogramming said drive and application programs of the non-volatile memory;

means for coupling said programmed computer to said wheelchair controller for accommodating an exchange of data therebetween; and

wherein said wheelchair controller being operative to communicate with said programmed computer through said coupling means to reprogram said drive and application programs of the non-volatile memory with said replacement programs while said non-volatile memory is disposed at said wheelchair.

2. The apparatus of claim 1 wherein the non-volatile memory includes predetermined memory locations for storing coded words;

and wherein the wheelchair controller is operative to execute one of the programs of the plurality of programs stored in the non-volatile memory to determine if the drive and application programs of the plurality are acceptable for execution based on said coded words stored in said predetermined memory locations.

3. The apparatus of claim 2 wherein the one program is executed by the wheelchair controller upon being powered up.

4. The apparatus of claim 3 wherein during the execution of the one program, if the drive and application programs are determined to be unacceptable for execution, the wheelchair controller is operative to enter a wait loop waiting for reprogramming data from the programmed computer.

5. The apparatus of claim 3 wherein during the execution of the one program, if the drive and application programs are determined to be acceptable, the wheelchair controller is permitted to divert program execution to the drive and application programs stored in the non-volatile memory to operate the wheelchair.

6. The apparatus of claim 1 wherein during the execution of the the drive and application programs, the wheelchair controller is operative to monitor if reprogramming data is being communicated thereto through the coupling means.

7. The apparatus of claim 1 wherein the non-volatile memory comprises a flash memory.

8. The apparatus of claim 1 wherein the general-purpose programmed computer comprises a personal computer.

9. The apparatus of claim 1 wherein the coupling means comprises a joystick unit of the wheelchair, said joystick unit being coupled to the wheelchair controller and operative to communicate therewith for operating the wheelchair.

10. The apparatus of claim 9 wherein the programmed computer is coupled to the wheelchair controller though a charger port of the joystick unit for communicating reprogramming data with the wheelchair controller bit serially from a communication port thereof.

11. The apparatus of claim 1 further comprising a joystick unit, said joystick unit being coupled to the wheelchair controller and operative to communicate therewith;

and wherein the programmed computer is configured to be removably coupled to the joystick unit by the communication channel, the programmed computer thereby communicating reprogramming data with the wheelchair controller via the joystick unit.

12. Apparatus for reprogramming a programmed controller of a power driven wheelchair, said apparatus comprising:

a reprogrammable memory including drive and application programs executable by said controller to operate said wheelchair, said memory coupled to said wheelchair controller;

a general-purpose computer programmed to reprogram said memory, said programmed computer for storing replacement programs for use in reprogramming said drive and application programs of the memory;

means for coupling said programmed computer to said wheelchair controller for accommodating an exchange of data therebetween; and

wherein said wheelchair controller being operative to communicate with said programmed computer through said coupling means to reprogram said drive and application programs of the memory with said replacement programs.

13. The apparatus of claim 12 wherein the reprogrammable memory comprises a programmable system device.

14. The apparatus of claim 12 wherein the reprogrammable memory includes a first and second memory section, a boot program being stored on said first memory section and drive and application programs being stored on said second memory section.

15. The apparatus of claim 12 wherein the general purpose computer is configured to download said replacement programs from a compact disk memory or memory diskette for use in reprogramming the reprogrammable memory.

16. The apparatus of claim 12 wherein the general purpose computer is configured to download said replacement programs from an internet website for use in reprogramming the reprogrammable memory.

17. Apparatus for reprogramming a programmed controller of a power driven wheelchair, said apparatus comprising:

a reprogrammable, non-volatile memory programmed with a plurality of programs, including drive and application programs executable by said controller to operate said wheelchair, said non-volatile memory disposed at said wheelchair and coupled to said wheelchair controller;

a general-purpose computer programmed to reprogram said non-volatile memory while disposed at said wheelchair, said programmed computer for storing replacement programs for use in reprogramming said drive and application programs of the non-volatile memory;

a communication channel for coupling said programmed computer to said wheelchair controller for accommodating an exchange of data therebetween; and

wherein said wheelchair controller being operative to communicate with said programmed computer through said communication channel to reprogram said drive and application programs of the non-volatile memory with said replacement programs while said non-volatile memory is disposed at said wheelchair.

18. The apparatus of claim 17 wherein the non-volatile memory includes predetermined memory locations for storing coded words;

and wherein the wheelchair controller is operative to execute one of the programs of the plurality of programs stored in the non-volatile memory to determine if the drive and application programs of the plurality are acceptable for execution based on said coded words stored in said predetermined memory locations.

19. The apparatus of claim 17 wherein during the execution of the drive and application programs, the wheelchair controller is operative to monitor if reprogramming data is being communicated thereto through the communication channel.

20. The apparatus of claim 17 wherein the non-volatile memory comprises a flash memory.